docs: consolidate CLI documentation and purge legacy structure

MERGE OPERATIONS:
- Merged /opt/aitbc/cli/docs into /opt/aitbc/docs/cli
- Eliminated duplicate CLI documentation locations
- Created single source of truth for CLI docs

ORGANIZATION IMPROVEMENTS:
- Created structured subdirectories:
  • implementation/ - Core implementation summaries
  • analysis/ - Analysis reports and integration summaries
  • guides/ - Installation and setup guides
  • legacy/ - Historical documentation (archived)

- Updated main README.md with:
  • New consolidated structure overview
  • Updated installation instructions for flat CLI structure
  • Recent CLI design principles changes
  • Proper navigation to subdirectories

- Created legacy/README.md with:
  • Clear deprecation notice
  • File categorization
  • Purge candidates identification
  • Migration notes from old to new structure

FILE MOVES:
- 15 implementation summaries → implementation/
- 5 analysis reports → analysis/
- 3 setup guides → guides/
- 19 legacy documented files → legacy/
- 1 demonstration file → root (active reference)

PROJECT DOCUMENTATION UPDATES:
- Updated /docs/beginner/02_project/1_files.md
- Reflected flattened CLI structure (cli/commands/ vs cli/aitbc_cli/commands/)
- Added docs/cli/ as consolidated documentation location
- Updated Python version requirement to 3.13.5 only

BENEFITS:
- Single location for all CLI documentation
- Clear separation of current vs legacy information
- Better organization and discoverability
- Easier maintenance and updates
- Proper archival of historical documentation

STATUS:
✅ Consolidation complete
✅ Legacy properly archived
✅ Structure organized
✅ Documentation updated

docs/cli/legacy/documented_Phase_3_Multi-Chain_Enhancement_Completion.md

@@ -0,0 +1,115 @@
+# Phase 3 Multi-Chain Enhancement Completion
+
+## Overview
+This document provides comprehensive technical documentation for phase 3 multi-chain enhancement completion.
+
+**Original Source**: cli/PHASE3_MULTICHAIN_COMPLETION.md
+**Conversion Date**: 2026-03-08
+**Category**: cli
+
+## Technical Implementation
+
+### **✅ Technical Benefits**
+
+
+**Complete Multi-Chain Coverage**:
+- **Uniform Options**: All utility commands use `--chain-id` and `--all-chains`
+- **Standardized Output**: Consistent JSON structure with query metadata
+- **Error Handling**: Robust error handling for individual chain failures
+- **Scalable Architecture**: Easy to add new utility endpoints
+
+**Enhanced Functionality**:
+- **Network Insights**: Chain-specific peer and validator information
+- **Token Economics**: Per-chain supply and token distribution data
+- **System Health**: Comprehensive availability and status tracking
+- **Service Integration**: Proper RPC endpoint integration with chain context
+
+---
+
+
+
+### **Implementation Metrics**
+
+| Metric | Target | Achieved |
+|--------|--------|----------|
+| **Commands Enhanced** | 3 | ✅ 3 |
+| **Test Coverage** | 100% | ✅ 100% |
+| **Backward Compatibility** | 100% | ✅ 100% |
+| **Multi-Chain Pattern** | Consistent | ✅ Consistent |
+| **Error Handling** | Robust | ✅ Robust |
+
+
+
+### **Key Achievements**
+
+
+- **100% of identified commands** enhanced with multi-chain support
+- **Consistent implementation pattern** across all commands
+- **Comprehensive testing suite** with 59 tests
+- **Full backward compatibility** maintained
+
+**✅ Enhanced User Experience**
+- **Flexible chain selection** with `--chain-id` option
+- **Comprehensive multi-chain queries** with `--all-chains` option
+- **Smart defaults** using `ait-devnet` for backward compatibility
+- **Robust error handling** with chain-specific messages
+
+**✅ Technical Excellence**
+- **Uniform command interface** across all enhanced commands
+- **Standardized JSON output** with query metadata
+- **Scalable architecture** for adding new chains
+- **Proper API integration** with chain context
+
+---
+
+
+
+### 🎉 **PROJECT COMPLETION STATUS**
+
+
+**Implementation**: ✅ **COMPLETE**  
+**Commands Enhanced**: ✅ **10/10 COMMANDS**  
+**Testing Suite**: ✅ **COMPREHENSIVE (59 TESTS)**  
+**Documentation**: ✅ **COMPLETE**  
+**Backward Compatibility**: ✅ **MAINTAINED**  
+**Multi-Chain Pattern**: ✅ **ESTABLISHED**  
+**Project Status**: ✅ **100% COMPLETE**  
+
+---
+
+
+
+### **🏆 Project Results**
+
+
+**✅ All Objectives Achieved**
+- **10 Commands Enhanced** with multi-chain support
+- **59 Comprehensive Tests** with 100% coverage
+- **3 Phases Completed** successfully
+- **0 Commands Remaining** needing multi-chain fixes
+
+**✅ Technical Excellence**
+- **Consistent Multi-Chain Pattern** established across all commands
+- **Robust Error Handling** for individual chain failures
+- **Scalable Architecture** for future chain additions
+- **Full Backward Compatibility** maintained
+
+**✅ User Experience**
+- **Flexible Chain Selection** with `--chain-id` option
+- **Comprehensive Multi-Chain Queries** with `--all-chains` option
+- **Smart Defaults** using `ait-devnet` for existing workflows
+- **Clear Documentation** and help messages
+
+
+
+
+## Status
+- **Implementation**: ✅ Complete
+- **Documentation**: ✅ Generated
+- **Verification**: ✅ Ready
+
+## Reference
+This documentation was automatically generated from completed analysis files.
+
+---
+*Generated from completed planning analysis*